Pneumatic-tube-stem dust-cap.



warmen L. renten, or 'aan nmoo, oamronma Pll'EllMATIeTUBE-STEM DUST-GA3Application led Dotation' 4, 1315. Serial No. 53,875.

To all lwhom t may concern.'

Be it known. that l', Wannen L. Firemen, a citizen of the United States,residing et filari Diego, in the county of Sen Diego and State ofCalifornia, have invented certain new and useful li'nlnovemente inPneumatic Tnbeteni Dust-Cape, of which the following,r ie asigieelleation.

My invention relates to doet cape for use on the ordinaijif valve e" nn'for pn tlzlies and the oliienfe J Iiiet, to provide e d 'wlfiieheonhinee a een 'for making: ti u 1i o?? the ,ive elem tight with a rap":eventiiig duet getting in around til valve stern; second, to provide neen of this kind which ie eiinpe and economical. oi eonetruetion,filiiirahle, easy oit' appiioatirm and does not readily get ont oforder; third, to provide a dust Cap which only requires a fen' turns to'make .it dust tight and the top end of the valve stein air tight;tonrth, to provide a combination dust cap for valve vSterns with an aircap and wrench. for removing the ordinary or conventional air valve, andfifth, to provide a dust cap of this clase which is applicable to theordinary or eonventional valve stein. now in use lith these and otherolijeete in view ae 3U ,will appear hereinafter, my invention. eenv *teof certain novel features of cone e tion, combination. and arrangementof parte as will be hereinafter described in detail and particularly setforth in the appended claim, reerenee being had to the noooinfpanyingdrawings te the eliaraetere of referenee thereon which form a part ofthis specification, in which:

Figure 'l is a side elevational View ofa Valve Stem showing r dust aanmounted thereon.; and Fig'. 2 is a sectional View thereof at a rightangle to that o Fig. l,

Similar characters of referene vrefer to similar parts throughout theviews.

The sleeve piece 1, gasket 2, cap piece 3, gasket 4 and gasket 5constitute the prinei pal of my dust cap.4

-The valve stem A is of the ordinary orl conventional type. Mountedthereon, by

means of threade adapted tothe threads on l .I claim ne new and desireto secure by Letthe stem, is the sleeve piece l which is pro vided witha flanged portion 1IL on the lower side and in the lower side lof Saidflange portion is lprovided an annular recess which is adapted for, andin which is mounted, the gasket 2 which is preferably a leather gasSpeoication of Letters lPatent.

Patented dan. 115, 1918y ket of the clase now in ordinary use. The

sleeve portion of the :sleeve piece l is spaeed apart from the stein eoas to give Snlioient clearance het een stern and the inner surface of:sleeve porti The nap 3 is; provided with an enlarged vportion 3 whichie 'provided in ite lower end with. an annular reces-e portion 3"adapted :for an elastic gesl t e which :is preferably soft rubber, theinner .surface of which fits tightly over the sleeve@ t l.. duced porti'n eaid een is thread 3 ada .for the thread (inced portion, off theortli" u tional valve stem. inlined' .ely above this threaded portion isa poel 3' adapted 'for the gasket. This gasket ie elastic, preiereblysoft rubber, for thefpnrpose 4of making an air tight t betweenthe'upper'end of the valve stem and Said cap; 0n the up# "r3-vided e onthe i moyen."

in the per end of eaideap 3 is provided a redneed portion 3 which. isprovided. mitsupper limited to this: 'particular eonetrnetion, eom-yhination and arrangen'ient but desire to in elude the purview' of myinvention the,

ooiiistrnetion, eombination and arrangement substantially as set forthin the appended elaine.

It :is obvious thaq with this construction, P

there is provided e jduet cap for air valve sterne for pneumati tubeswhich. combines the dust cap and air cap; that the device is simple andeconomical of constrnotion, durable, easily applied and will; notreadily get ont of order; that the duet ea-p requires but a few turns tomake .it dust proof; that the gasket 4, being squeezed onto the sleeve1, will provide a tight ft between the cap plece il and said sleevepiece l; that the sleeve portion of the sleeve piece 1 may be Shortenedor lengthened to suit different length valve stems and different makesof wheel rime.

Having thus described my invention, what *valve tem, .a cap `adapted totloosely over between said cap and :seidv sleeve, una said 'sgidfsleevepxzovided with a recess near its cap is separately removable from saidstemf lombriz-edge and threaded internally near its and sleeve.`tlopefndffdapted to screw onto 'the upper In testimony whereof, I havehereunto yeend of-seidpneumetie tube stem, a asket set my hand et SenDiego, California, this f mounted in said .recess adapted to fit tightly27th day of 4September, 1915. y y

overlgsaid sleeve whereby a seal is effected WALT-ER L. FRAZERl

